Conference_programme: 21.1 - Source localization and acoustic array processing
Lecture: Acoustic Source Localization in Hemispherical Harmonics Domain
Author(s): Kumari Deepika , Kumar Lalan
Summary:
This paper addresses the issue of far-field sound source localization using hemispherical microphone array (HMA). Rather than conventional spherical harmonics (SH), hemispherical harmonics (HSH)\nbasis functions are utilized herein. The hemispherical harmonics basis functions provide more accurate representation of hemispherical functions when compared to spherical harmonics. Source localization using spherical microphone array makes use of spherical harmonics. Previous work presented sound\ncapture and beamforming using HMA that is based on acoustic image principal in spherical harmonics domain. However, hemispherical harmonics has hitherto not been investigated for source localization. Optimal array processing methods such as MUltiple SIgnal Classification (MUSIC) and minimum variance distortionless response (MVDR) are reformulated in HSH domain. Hemispherical harmonics\nMUSIC (HSH-MUSIC) and hemispherical harmonics MVDR (HSH-MVDR) methods are presented for source localization. The relative performance is presented using various experiments on source localization.
Corresponding author
Name: Dr Lalan Kumar
e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Country: India
